2221961089157 has 4 divisors (see below), whose sum is σ = 2223871632960. Its totient is φ = 2220050545356.

The previous prime is 2221961089151. The next prime is 2221961089163. The reversal of 2221961089157 is 7519801691222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2221961089151) and next prime (2221961089163).

It is a cyclic number.

It is not a de Polignac number, because 2221961089157 - 2⁴ = 2221961089141 is a prime.

It is a super-2 number, since 2×2221961089157² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221961089099 and 2221961089108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221961089151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 955270157 + ... + 955272482.

It is an arithmetic number, because the mean of its divisors is an integer number (555967908240).

Almost surely, 2^{2221961089157} is an apocalyptic number.

It is an amenable number.

2221961089157 is a deficient number, since it is larger than the sum of its proper divisors (1910543803).

2221961089157 is a wasteful number, since it uses less digits than its factorization.

2221961089157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910543802.

The product of its (nonzero) digits is 1088640, while the sum is 53.

The spelling of 2221961089157 in words is "two trillion, two hundred twenty-one billion, nine hundred sixty-one million, eighty-nine thousand, one hundred fifty-seven".